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Historic Bombs are Defused in Hong Kong; Russian Athletes Have an Olympic Ban Overturned; An Orca Mimics Its Trainer; Super Bowl LII Aims for Zero Waste

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CARL AZUZ, CNN 10 ANCHOR: Hi. I'm Carl Azuz. And I'd like to introduce you to my good friend Friday. She's awesome.

Let's get rolling with this February 2nd edition of CNN 10.

First to East Asia. Hong Kong is a special administrative region of China, but it was part of Great Britain between 1842 and 1997. And that's why during the Second World War in 1941, Japanese troops invaded Hong Kong after their nation had declared war on Britain and the U.S. The U.S. Army

Air Corps began bombing the territory a year later. Dozens of air raids struck Hong Kong.

And just like we've seen in parts of Germany, unexpected World War II bombs continue to be unearthed in Hong Kong decades later. Two of them have been found in the past week and at least one of the bombs was confirmed to be an American design.

Just because these devices are 75 years old doesn't mean they're no longer dangerous. Evacuations were made, roads and businesses were closed and some ferry services had to be stopped while experts worked around the clock to defuse the bombs. Both were the same type but one of them had a badly damaged fuse, making it more challenging to defuse.

Hong Kong's explosive disposable unit finished the job on Wednesday morning. CNN's Ivan Watson was there.

(BEGIN VIDEOTAPE)

IVAN WATSON, CNN SENIOR INTERNATIONAL CORRESPONDENT: It's not often that you see the bomb squad in downtown Hong Kong. But that's what we're seeing now for the second time in just five days, because construction workers digging here in this crowded financial hub have uncovered two, two unexploded bombs from World War II.

Now, the bomb squad who'd been at work here have identified them as 1,000- pound general purpose aircraft bombs, left over from World War II, from more than 70 years ago when this was periodically hit by American warplanes after Japanese forces had captured and occupied this former British colony.

So, what we're seeing now is these men hard at work in the mud. It's been raining here, trying to get a sense of the potential risk, that this unexploded device could have. Now, it's important to note that this is one of the most densely populated cities in the world. A number of businesses in the area have closed. There's been evacuation because there's a swimming pool over here as well.

But here you have Hong Kong, the city more than 70 years after World War II still dealing with the dangerous and unexploded legacy of that terrible conflict.

Ivan Watson, CNN, Hong Kong.

(END VIDEOTAPE)

AZUZ: Dozens of Russian athletes banned from the Olympic Games have just had those bans overturned. After an investigation into alleged doping,

illegally taking drugs to perform better in the 2014 Winter Games, the International Olympic Committee had banned 43 Russian athletes from ever competing again.

But almost all of them recently appealed to the Court of Arbitration for Sport, an organization based in Switzerland. And it said yesterday that for 28 of these athletes, there was insufficient evidence to show they've broken the rules. It overturned their bans and reinstated their results from the 2014 Games. For 11 other Russian athletes, the court said there were doping violations, but that their ban would be for the 2018 Winter

Games and not forever, that they'd be able to compete in the future.

For those bans were overturned completely, this does not necessarily mean they can compete in Pyeongchang, South Korea, starting next week. They'll first need to be approved by an International Olympics Committee panel and then invited to join the other Russian athletes who were not allowed to compete under the Russian flag because of the scandal. The Russian government, which has denied that it had a doping program, said it was very happy with the decision.

The International Olympic Committee said it could have a serious impact on the future fight against doping and that it might appeal the decision at

Switzerland's highest court.

(BEGIN VIDEOTAPE)

SUBTITLE: This killer whale can mimic the sounds of her trainer's words.

Wikie was trained to imitate a handful of words.

TRAINER: Hello.

One, two.

One, two.

Amy. Amy.

Bye-bye. Bye-bye.

SUBTITLE: International researches released a study based on Wikie's ability to repeat human speech.

JOSEP CALL, CO-AUTHOR OF THE STUDY: Is it a breakthrough? Is this something that they think we didn't know before? Yes, that is the case.

SUBTITLE: Call says it's the first time a killer whale has been documented repeating words.

CALL: That's the killer whale, when the killer whale says hello, that she knows what you're saying, I doubt it sincerely.

SUBTITLE: Wikie's abilities suggest whales could learn to communicate by imitating sounds.

CALL: Whether they could then use this vocalization, these sounds that they produce now, whether they could then use them to interact with humans or with other killer whales is an open question. It's a fascinating but an open question.

(END VIDEOTAPE)

(BEGIN VIDEO CLIP)

AZUZ (voice-over): Ten-second trivia.

What was the original name of the game later known as "Super Bowl I"?

AFL-NFL World Championship, NFL Playoff I, Super Techmo Bowl, or AFC-NFC World Championship?

Don't get confuse here. The 1967 game was called the AFL-NFL World Championship.

(END VIDEO CLIP)

AZUZ: That makes this year game Super Bowl 52, or LII in Roman numerals. It's set for Sunday at 6:30 p.m. Eastern. It's a rematch for the New

England Patriots and the Philadelphia Eagles who met 13 years ago in Super Bowl 39. New England won that game 24-21, but officials are hoping this year's score is zero, at least as far as waste goes.

Zero waste means all thrash from the game would be recycled somehow and not burned or buried. More than 66,000 fans will be at U.S. Bank Stadium.

Over the course of the day, they'll produce about 40 tons of trash.

The National Football League and the stadium are working with other partners with the goal of zero waste. So, food vendors of the game are switching to compostable containers and cups. This could be more expensive for stadiums to use. It might affect prices. But these items decay naturally and could be used to fertilize soil rather than grow landfills.

Officials are hopeful that 90 percent of all thrash from the Super Bowl will be either recycled or composted. The other 10 percent would be incinerated, completely burn up but in an energy plant that could turn that waste into electricity. Football fans would have to put garbage on the right containers, so extra staff will be needed to help with that.

And after the Super Bowl, officials are hoping that U.S. Bank Stadium would remain a zero waste building. Other stadiums have not kept that up after the game.

Fifty thousand homes in the Minneapolis area currently compost. That's a fraction of all the homes there, but it's still a higher number than many other cities have. Downsides include attracting more pests and flies, and critics say it smells bad.

(MUSIC)

AZUZ: In the year 2000, NASA launched a satellite designed to observe the Earth's magneto sphere, an area around the planet controlled by its magnetic field. NASA lost contact with the spacecraft in 2005. Scientists said it went lifeless. They weren't sure why, but they declared it to be lost.

But earlier this year, an amateur radio astronomer who lives in Canada heard a signal that seemed to match that of the Image spacecraft. Scott

Tilley told NASA. They started tracking it and they eventually confirmed it was from Image.

Now, they're all hoping scientists can get it running again to learn more about the magneto sphere.

All in all, it's pretty magneto. You could say why the astronomer got a charge out of it, why he was drawn to it, how it's a polarizing discovery,

how to put a down-to-earth guy into orbit. In the grand sphere of things, it's just not to be taken satelightly.

I'm Carl Azuz for CNN 10. We hope your weekend is magnificent.

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